The light is strong, with less plant mass you won't be able to fight it. Get some very fast growing plants. Don't trim the plants unless its dying let it go wild.
If possible raise the fixtures rather than resting over the lids. Also ramp down the photoperiod to 6-7 hours. With 3 hours of siesta in between (3hrs - ON; 3hrs OFF; 3hrs ON)
My first tank was a 10 gallon with same lights but without lid and 3" raised from the top. I had a bit more plants to begin with never ran into algae problem.
I happened to inherit Coral life digital power centers which was like 2 years old. Its doing its job. Bit tricky to setup without instruction booklet.